Police say they do not consider the incident a "potentially criminal matter" following a brief investigation.

Business groups and a council say there were energy capacity problems before a fire near Heathrow.

Sir Keir Starmer says he is 'deeply concerned' about the closure of Heathrow Airport as a result of a power cut caused by a fire on Friday.

Heathrow's boss previously said the shutdown was not for lack of power but to reboot complex systems.

Energy Secretary Ed Miliband says there are lessons to be learned after substation fire led to major flight disruption on Friday.

Adam Boggon spent more than a day on planes, trains and automobiles but made it to his friend's wedding reception at Loch Lomond.

Thomas Woldbye told the BBC his team had to deal with a situation "created outside the airport".

Heathrow was closed for most of Friday after a fire at a nearby electrical substation.